Blast-furnace top.



PATENTED APR. 7, 1903; J. c. GROMWELL & 0. w. A. KOELKEBBGK.

I BLASTFURNAG-E TOP.

30 MODEL.

APPLICATION FILED SEPT. 24, 1902.

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UNITED STATES-O PATENT OFFICE.

JOHN C. OROMWELL AND CARL A. KOELKEBEOK, OF CLEVELAND, OHIO.

BLAsT-F'u NATcE TOP.

SPECIFICATION forming part of Letters Patent No. 724,670, dated April 7, 1903. Application filed September 24, 1902. semi No.124,603- (No models To all whom, it may concern;

Be it known that we, JOHN C. OBOMWELL and CARL W. A. KOELKEBEOK, of Cleveland,

Ouyahoga county, Ohio, have invented a new to do away with the radial brackets in the masonry shaft and afiord a simple and strong construction.

In the drawings,2 represents the outer metal shell of the shaft, 3 the inner masonry shaft,

and 4 the space between them, which may be provided with a suitable filling of broken slag or other material. The masonry shaft is stepped inwardly at the top to give the usual inwardly-converging shape, while the metal shell 2 extends vertically upward and is connec ted at its top by a horizontal plate or plates 5, forming the top working platform of the furnace, to the flanged ring 6, supporting the hopper 7. To support the inner periphery of the top plate or plates 5, supporting the ring 6, from which the hopper is hung, we provide radial braces 8 in the form of segmental plates having vertical longitudinal ribs, these plates extending at an angle from the shell 2 and upwardly to the position of the ring 6, where they are connected to said top plate or plates 5. These bracesdo not form a closed top, there being spaces between their edges, and merely act as bracing-supports.

The advantages of our invention result from the supporting of the top plate or plates of the furnace by the inclined braces or supports springing from the outer metallic shell of the stack, a simple and strong construction being afforded thereby. We have shown the down-comer 9 as extending through the top plate 5 and into one of the brace-plates 8, a hole 10 being formed through the inwardlyconverging masonry stack to lead the gases to the down-comer.

Many variations may be made in the form and arrangement of the parts without departing from.our invention.

1. A blast-furnace having an outer vertically-extending metal shell, an inner masonry stack, a horizontally extending metal top plate surrounding the opening in the top of the furnace and connected to the outer shell, and radial upwardly-inclined braces entirely outside the masonry stack and connected to the metal shell and to the top plate at or near the inner edge of the, latter, said top plate being entirely outside the masonry stack and form- 'ing the working platform. at the top of the furnace", substantially as described.

2. A blast-furnace having an outer vertically-extending metal shell, an inner masonry stack, a horizontalmetal top plate connected to the outermetal shell and extending inwardly. to the opening in the top of the furnace, and radial brace-plates connected to the outer shell and extending entirely outside the masonry and inwardly and upwardly and connected to the metal top plate at or near its inner edge, said topplate being entirely outside the masonry stack and forming the workingplatform at the top ofthe furnace, substantially as described.

3. A blast-furnace having an outer vertically-extending metal shell, a horizontallyextending metal top plate surrounding the opening in the top of the furnace and connected to said shell, inclined brace-plates outside the masonry and connected to the outer metal shell andextending upwardly and inwardly and connected to the top plate at or near its inner edge, and a down-comer extending through the top plate and connected to the brace-plates, substantially as described.

4. A blast-furnace having an outer vertically-extending metal shell, an inner masonry stack, a horizontally extending metal top plate surrounding the openingin the top of the furnace and connected to the outer shell, and radial upwardly-inclined brace plates having their greatest area disposed in the" plane of their inclination and connected tothe shell and to the top plate; said top plate being entirely outside the masonry stack and forming the working platform at the top of the furnace, substantially as described.

5. A blast-furnace having an outer vertically-extending metal shell, an inner masonry form at the top of the furnace, substantially stack, a horizontallyextending metal top as described. plate surroundingthe openingin the top of the In testimony whereof we have hereunto set furnace and connected to the outer shell, and our hands.

5 radial upwardly-inclined brace-plates disposed closely together forming a substan- E Z tially continuous brace around the furnace and connected to the shell and to the top plate; Witnesses: said top plate being entirely outside the ma- H. D. SMITH,

[O sonry stack and forming the working plat- HORACE W. LASH. 

